Hoist



pn' W, i945. w. CAREY 2,373,455

HOIST Filed April 5, 1944 2 Sheets-Sheet l attac/vwd pxri W9 945. w.CAREY ,373,45

HOIST Filed April 5, 1944 2 Sheets- Sheet 2 l Ww@ w @away PatenteriApr.10, i945@ This invention relates to a hoist or jack. lt is particularlyaimed to provide a structure which is operable hydraulically and whichmay engage a load at the ground or floor line.

In addition, it is aimed to provide a novel structure wherein the shoeor platform which is en-l gageable with the load to lift it, is carriedby a vertically movable flexible means including a ceiling strip or avertical opening or slot in which it moves.

also aim to provide a novel housing for the flexible means whenretracted.

The more specific objects and advantages will become apparent from aconsideration of the description following taken in connection withaccompanying drawings illustrating an operative embodiment.

In said drawings:

Figure 1 is a view of the hoist in front elevation;

Figure 2 is a vertical sectional view taken on the line 2 2 of Figure 1;

Figure 3 is a horizontal section taken on the line 3-3 of Figure 2;

Figure 4 is a horizontal section taken on the line of Figure 2;

Figure 5 is a fragmentary elevation of the flexible lifting element; and

Figure 6 is va vertical section, fragmentary, taken on the line 6 6 ofFigure 3, with the flexible lifting means removed.

Referring specifically to the drawings wherein like reference charactersdesignate like or similar parts, I provide a cylinder at I0 of metal orother suitable material and of any desired diameter and height, the samepreferably having lugs II at its base to facilitate non-slidingengagement with the ground or a floor or the like.

Coacting with the cylinder I0 is a flexible lifting element generallydesignated I2, capable of projection and retraction. This liftingelement when retracted, occupies the helical groove orspace I3 of acontainer I4, suitably mounted within the cylinder I0 as shown. Suchflexible element comprises a series of metallic, wooden or other rigidslats I 5 preferably in contiguous relation as shown, and fastened to aflexible strap I6, preferably elastic and of rubber, including syntheticrubber, or the like.

It will be noted that the cylinder I0 has an elongated groove Il incontinuation of the groove I3 of the container I so that the slats I 5may be moved therein. The Wall of the container at the portion in whichthe groove I'I is provided, is thickened as at I8 and in front of suchgroove, has an elongated slot I9 communicating therewith andbehind suchgroove has an elongated slot 20 narrower than the groove and also.oommunicating therewith. The strip I6 snugly nts 'the slot 20 andfunctions as a gasket.

Slidable longitudinally of cylinder I0 ls a follower or head @I of metalor any other suitable material, preferably provided with one or moregaskets at 22, for instance, of rubber, including synthetic rubber, towipe the inner surface of the cylinder. A platform or foot is providedat 23 to engage the load to be lifted. This platform has a, shank 26which is engaged in the slot I9 so that it will be guided and steadied,and it has a stud 25 extending inwardly therefrom through one of theslats I5 and thence into and through the rubber strip or gasket I6 andalso into the head 2l, preferably being anchored thereto as by means ofa pin 26,

It will be particularly noted that the foot 23 has a series of tines 21or any equivalent, which are .capable of disposition directly on theground, floor or any other supporting surface engaged by the cylinderII, this being a great advantage over ordinary hydraulic jacks orhoists.

Any operating fluid, preferably an hydraulic fluid, is adapted to besupplied to and removed from the cylinder I@ from any suitable source asthrough a conduit 28, which fluid will raise or project the head ZI andaccordingly extend the dexible element I2 and platform or foot, 23, soas to lift the load. As the hydraulic fluid recedes from the cylinderIll, head 2I will lower of its ownweight and under the urgency thereof,the flexible element I2 will be restored into the helical groove I3. Itis to be particularly noted that the strip I6 functions dually insecuring the slats I5 together and in functioning as a gasket to sealthe slot 2d against leakage of hydraulic fluid. l

If desired, 4the contiguous edges of the slats I5 may be pivoted to eachother. Above the head 2|, I preferably provide limit stops 29.

Various changes may be resorted to provided they fall within the spiritand scope of the invention.

I claim as my invention:

1. A hoist of the class described comprising a cylinder to receivehydraulic fluid, said cylinder having a groove, said cylinder havingfirst and second slots on opposite sides of the groove'communicatingtherewith and narrower than the groove, a head slldable in the cylinderaccording to the action of hydraulic fluid, a flexible elementcomprising contiguous slats movable in said groove, a band to which theslats are secured occupying one of said slots.` and functioning as agasket, a platform for engagement with the load, said platform beingsecured to one of the slats and the strip and said head.

2. A hoist of the class described comprising a cylinder to receiveyhydraulic iluid, said cylinder having a groove, said cylinder havingrst and second slots on opposite sides of the groove communicatingtherewith and narrower than the groove, a head slidable in the cylinderaccording to the action of hydraulic fluid, a ilexible elementcomprising contiguous slats movable in said groove, a band to which theslats are secured occupying one of said slots, and functioning as agasket, a platform for engagement with the load,

said platform being secured to one of the slats and the strip and saidhead, and a container within the cylinder having a helical passage toenable retraction of the flexible element.

3. A structure of the class described comprising a cylinderfor admissionand release of hydraulic l fluid. a head slidable in the cylinderaccording to the action of hydraulic uid, a platform carried by the headfor engagement with the load, said cylinder having an elongated slotthrough which the platform extends, and means movable with the platformand head to seal said slot.

4. A structure of the class described comprising a cylinder foradmission and release of hy v

